There are many other dimensions. These UFOs are either demons and/or a lot of it is stuff our own govt has engineered and they keep it secret.
So, how do “demons” flying around in inter dimensional craft affect us?
And what exactly is a demon and why would they need mechanical crap to move from one place to another, when SATAN and God seem to do this stuff without being corporeal?
The whole demon thing is a throwback to fairies, leprechauns, and wood sprites. There may have a been a basis from the from prehistoric times, because they were not understood—but to “believe” in that stuff now is a stretch.